Geotechnical Vermont Archives - GEOTILL provides geotechnical, construction testing and Environmental services Indianapolis Indiana

Europe on course for healthier, more sustainable soil

Source: On course for healthier, more sustainable soil On course for healthier, more sustainable soil Soil is home to about a quarter of all living species. Credit: Amadeu Biasco, Shutterstock If we want to transition to a greener, healthier and more climate resilient Europe, it is important to ensure our soils are in good condition. However, the quality of soils is worsening because of unsustainable management practices, depletion of resources, climate change and pollution. Soil hosts a quarter of our planet's biodiversity and is home to about a quarter of all living species. But how many of us give this precious resource a second thought? We should, because soil directly or indirectly produces about 95% of our food. Soil is important in so many other ways, too. It provides us with raw materials to fight diseases and ecosystem services that purify our drinking water, lower the risk of floods and droughts, and store huge amounts of carbon to alleviate climate change. Storehouse of life Soil biodiversity is the life that exists within the soil, from bacteria to earthworms. These living organisms keep soil healthy and fertile. Soil biodiversity is key to meeting European Green Deal objectives such as climate neutrality, biodiversity restoration, zero pollution, healthy and sustainable food systems, and a resilient environment. The EU wants to lead the transition towards healthy soils for food, people, nature and the climate by 2030. One problem is that about 970 million tons of soil is lost to erosion each year in Europe. If this underground treasure is so important to us, then why are we allowing it to be destroyed? To repair or reverse the damage to soil's rich yet fragile habitat takes decades—even centuries. We need to preserve the quality of soil before it is too late. Soil health is a major concern for the commission. It [...]

By kk42|September 29th, 2021|Geotechnical New Mexico, Geotechnical New York, Geotechnical Vermont, Geotechnical Nebraska, Geotechnical California|0 Comments

Project removes old, disused dams to make healthier waterways

Source: Project removes old, disused dams to make healthier waterways - VTDigger Seen through the window of Patty Smith’s home in East Bethel, James Rogers, left, and Fran Rhynhart, right, watch as Ben Canonica, of Canonica Farm and Forest, makes a buffer to protect the bank of the Second Branch of the White River while preparing to remove the Hyde Dam on Tuesday, Sept. 15. “As kids, this was our playground,” said Rhynhart. “All the East Bethel village kids would swim here.” Photo by James M. Patterson/Valley News EAST BETHEL — A yellow excavator ambled over the uneven bed of the Second Branch of the White River as it rearranged boulders above the Hyde Dam earlier this month. Within weeks, the dam will be gone, opening 60 miles of waterways for fish passage. From the 1700s to the 1950s, hydropower ruled and the Hyde Dam in turn gave life to a sawmill, a gristmill, a creamery and a woolen mill that employed over 30 workers in 1860. The current dam replaced an older dam destroyed in what is known as the Great Vermont Flood of 1927. These days, industry has departed from the Second Branch. A half-acre plot of empty land on the north side of the dam gives no hint of the artifacts of production buried below. The mill that leans on the southern edge of the dam is now a home. Conservation nonprofits and state agencies worked together to remove the dam, part of a statewide effort to remove out-of-use dams to improve rivers for both wildlife and people. Greg Russ, a watershed restoration coordinator at the White River Partnership who is overseeing the project, estimated that it will cost anywhere between $120,000 and $150,000. He listed many reasons to remove the dam, for both the [...]

By kk42|September 29th, 2021|Geotechnical Massachusetts, Geotechnical New Hampshire, Geotechnical New York, Geotechnical Rhode Island, Geotechnical Vermont, Geotechnical Alaska, Geotechnical Connecticut|0 Comments

Construction Vibrations

Source: Construction Vibrations -NEW (7004IW2022) INSTRUCTOR: Antonios Vytiniotis, Ph.D., P.E Participants will have access to the virtual workshop video archives and materials for 60 days from the start day of the workshop. Virtual Workshop Brief The workshop will cover a variety of issues regarding construction vibrations. It will start by describing the sources of construction vibrations, the propagation of vibrations with a soil and scatter effects. Then it will cover the effects of such vibrations in: 1) structures; 2) human perception; and 3) indirect effects of such vibrations. The workshop will cover examples of construction vibration effects in various structures and will show how conditions in structures can be evaluated to understand whether they are caused by vibrations. The workshop will show how construction vibrations can be monitored effectively by state-of-the-art equipment. Finally, this workshop will show how to analyze the data from monitoring to generate valuable insights about their effects on structures. A greater understanding of construction vibrations will help in mitigation of their damaging effects. Benefits and Learning Outcomes Upon completion of this course, you will be able to: Explain sources of construction vibrations Explain effects of construction vibrations Explain causation of damage potentially associated with construction vibrations Monitor construction vibrations Mitigate construction vibrations Avoid costly adjacent construction litigation Assessment of Learning Outcomes Achievement of the learning outcomes by attendees will be assessed through online discussion and case studies. A short post-assessment (true-false, multiple choice and fill in the blank questions) will also be administered. Who Should Attend Geotechnical Engineers Structural Engineers Civil Design Engineers Owners Construction City Planners Workshop Outline Day 1 Construction Vibration Sources Vibration Propagation and Energy Dissipation Discussion about Literature Data Interactive discussion and quiz about sources, propagation and state of the practice Human Perception of Vibrations Direct Effects of Vibrations Interactive discussion about effects [...]

By kk42|September 23rd, 2021|Geotechnical Alabama, Geotechnical Washington, Geotechnical Connecticut, Conferences, Geotechnical Kansas, Geotechnical Mississippi, Geotechnical Arizona, Geotechnical Idaho, Geotechnical Massachusetts, Geotechnical New York, Geotechnical Oregon, Geotechnical Ohio, Geotechnical South Carolina, Geotechnical Vermont|0 Comments

UD researchers study climate change impacts on soils at military installations

Source: The Ground Underfoot - Civil and Environmental Engineering UD researchers study climate change impacts on soils at military installations We walk over it, drive over it and build on it. Yet, it is probably safe to say, most of us rarely think about the ground beneath our feet. Underneath the grass, concrete, asphalt and other materials in our built environment, however, soil provides structure and stability for what lies above. The United States military wants to understand the role that climate impacts, such as flooding, storm surge or sea level rise, will have on soils at its coastal military bases and facilities, which are critical to national security. Soil conditions can affect the integrity of the ground underpinning buildings, roads, bridges and more. For example, if a soil’s pH were to rise significantly, due to increased salt content-containing ions such as sodium from storm surge, it could create saline conditions that could hamper the ground’s ability to support this necessary infrastructure. Understanding these threats will enable faster and more accurate routing and maneuverability for U.S. forces. The Delaware Environmental Institute (DENIN) is collaborating with the Engineer Research and Development Center (ERDC) of the U.S. Army Corps of Engineers and Louisiana State University to understand how vulnerable military installations along coasts may be affected by soil changes due to sea level rise and coastal flooding. DENIN has received $3.79 million in first- and second-year funding from the U.S. Department of Defense to start this work, and is eligible for an additional $3.82 million in continued funding over the following two years. Led by DENIN Director Don Sparks, Unidel S. Hallock du Pont Chair of Soil and Environmental Chemistry in UD’s Department of Plant and Soil Sciences, the UD effort includes interdisciplinary collaboration with Yan Jin, Edward F. and Elizabeth Goodman Rosenberg Professor [...]

By kk42|September 22nd, 2021|Geotechnical Iowa, Geotechnical Virginia, Geotechnical Colorado, Geotechnical Michigan, Geotechnical New York, Geotechnical Kansas, Geotechnical Washington, Geotechnical Delaware, Geotechnical Missouri, Geotechnical North Dakota, Geotechnical Mississippi, Geotechnical Wyoming, Geotechnical Idaho, Geotechnical Georgia, Geotechnical Oklahoma, Geotechnical Nebraska, Geotechnical Louisiana, Geotechnical Maryland, Geotechnical Oregon, Geotechnical North Carolina, Geotechnical Maine, Geotechnical Pennsylvania, Geotechnical Rhode Island, Geotechnical West Virginia, Geotechnical Indiana, Geotechnical Massachusetts, Geotechnical Wisconsin, Geotechnical South Carolina, Geotechnical USA, Soil Testing, Geotechnical Montana, Geotechnical Minnesota, Geotechnical South Dakota, Geotechnical US, Geotechnical Kentucky, Geotechnical Nevada, Geotechnical Alabama, Geotechnical Texas, Geotechnical Arizona, Geotechnical Tennessee, Geotechnical New Hampshire, Geotechnical Connecticut, Geotechnical Utah, Geotechnical Arkansas, Geotechnical Ohio, Geotechnical New Jersey, Geotechnical Florida, Geotechnical Vermont, Geotechnical California, Geotechnical Illinois, Geotechnical New Mexico|0 Comments

Parameters Variation Model Customization and Sensitivity Analyses

Source: Parameters Variation: Model Customization and Sensitivity Analyses Parameters Variation Model Customization and Sensitivity Analyses A well-known engineering challenge in the framework of finite element (FE) analysis-based design is the large number of input factors involved in geotechnical computational models. There is always a significant amount of uncertainties associated with the properties of geomaterials, being naturally highly heterogeneous materials. In the context of model calibration and validation, conducting a sensitivity analysis is very important. This can determine the key factors which govern the system and efficiently characterize the geotechnical variability for any considered design problem. Powerful mechanisms for the consideration of parameter variation are also very interesting for speeding up FE model creation and automating results in post-processing. These are also quite useful in reducing model definition for specific types of engineering problems (excavation wall of a specific type under simple ground conditions, simple tunnel shape in uniform rock mass, etc.) to a limited number of parameters that can be inputted in a text file or Microsoft Excel spreadsheet without expert knowledge of the PLAXIS user interface and different modeling techniques and FE know-how. The sensitivity analysis and parameter variation tool in PLAXIS A sensitivity analysis determines how different values of an independent variable affect a particular dependent variable under a given set of assumptions. In other words, sensitivity analyses study how various sources of uncertainty in a mathematical model contribute to the model's overall uncertainty. The Sensitivity Analysis and Parameter Variation tool (see Figure 1) can be used to evaluate the influence of model parameters on calculation results for any particular PLAXIS FE model: The Select Parameters tab sheet will first provide information about all the parameters that can be changed to perform the sensitivity analysis. Available parameters include most model parameters of the data sets for soil and [...]

By kk42|September 21st, 2021|Geotechnical New Mexico, Geotechnical Iowa, Geotechnical Virginia, Geotechnical Colorado, Geotechnical Michigan, Geotechnical New York, Geotechnical Kansas, Geotechnical Washington, Geotechnical Delaware, Geotechnical Missouri, Geotechnical North Dakota, Geotechnical Mississippi, Geotechnical Wyoming, Geotechnical Idaho, Geotechnical Georgia, Geotechnical Oklahoma, Geotechnical Nebraska, Geotechnical Louisiana, Geotechnical Maryland, Geotechnical Oregon, Geotechnical North Carolina, Geotechnical Maine, Geotechnical Pennsylvania, Geotechnical Rhode Island, Geotechnical West Virginia, Geotechnical Indiana, Geotechnical Massachusetts, Geotechnical Wisconsin, Geotechnical South Carolina, Geotechnical USA, Geotechnical Kentucky, Geotechnical Montana, Geotechnical Minnesota, Geotechnical South Dakota, Geotechnical US, Geotechnical Tennessee, Geotechnical Nevada, Geotechnical Alabama, Geotechnical Texas, Geotechnical Arizona, Geotechnical Ohio, Geotechnical New Hampshire, Geotechnical Connecticut, Geotechnical Utah, Geotechnical Arkansas, Geotechnical Illinois, Geotechnical New Jersey, Geotechnical Florida, Geotechnical Vermont, Geotechnical California|Comments Off

A Climate Change-Induced Disaster in Denali National Park

Source: A Climate Change-Induced Disaster in Denali National Park | Time The Times has recently showcased an article on the current rockslide situation in Denali National Park. The effects of climate change have been dramatic with the current melting of the permafrost. The National Parks Service has recently upped through gravel removal of the Pretty Rocks Landslide in an effort to keep up as the rapidly thawing permafrost picks up pace. Alaska is right now recognized as the country’s fastest-warming state. The landslide hit unprecedented speed 4 weeks ago causing the team to close the back half of the park weeks earlier than anticipated. This only signals bad news as reservations are canceled in the short term and the long term implications are yet unknown. “This is the canary in the coal mine for infrastructure disruption in Alaska,” says the Camp Denali lodge owner Simon Hamm. “If things continue on the path they’re on, it’s not going to just be Pretty Rock—it’s going to be half of the Alaskan highway system.” Rapid deterioration Denali National Park is one of the U.S.’s largest national parks at 6 million acres, and sits about four hours north of Anchorage. While the entrance to the park is certainly beautiful, many people prefer to hop on buses to access the park’s marquee attractions deep down its single 92-mile road: views of Mt. Denali (formerly Mt. McKinley), the highest peak in North America at 20,000 feet; the gleaming Wonder Lake; rolling mountainsides that contain an abundance of wildlife, including grizzly bears, moose, caribou and bighorn sheep. About halfway along the road lies the Pretty Rocks Landslide, a slowly sliding section of earth that acts more like a glacier than a rockfall. Since the 1960s, permafrost deep below the earth’s surface has thawed, causing the soil and [...]

By kk42|September 21st, 2021|Geotechnical Michigan, Geotechnical North Dakota, Geotechnical Mississippi, Geotechnical Idaho, College, Geotechnical Missouri, Geotechnical Oklahoma, Geotechnical Nebraska, Geotechnical Louisiana, Wasilla, Geotechnical Georgia, Geotechnical Oregon, Geotechnical North Carolina, Geotechnical Maine, Tanaina, Geotechnical Maryland, Geotechnical Rhode Island, Geotechnical West Virginia, Geotechnical Massachusetts, Lakes, Geotechnical Pennsylvania, Geotechnical South Carolina, Geotechnical USA, Landslides, Geotechnical Montana, Kalifornsky, Geotechnical Minnesota, Geotechnical South Dakota, Geotechnical US, Geotechnical Alaska, Geotechnical Indiana, Geotechnical Nevada, Geotechnical Alabama, Geotechnical Texas, Geotechnical Arizona, Anchorage, Geotechnical Kentucky, Geotechnical New Hampshire, Geotechnical Connecticut, Geotechnical Utah, Geotechnical Arkansas, Juneau, Geotechnical Tennessee, Geotechnical New Jersey, Geotechnical Florida, Geotechnical Vermont, Geotechnical California, Fairbanks, Geotechnical Ohio, Geotechnical New Mexico, Geotechnical Iowa, Geotechnical Virginia, Geotechnical Colorado, Badger, Geotechnical Illinois, Geotechnical New York, Geotechnical Kansas, Geotechnical Washington, Geotechnical Delaware, Knik-Fairview|0 Comments

Geotechnical Instrumentation and Monitoring Consumption Market Size to Witness Huge Growth by 2027 | By Top Leading Vendors – Keller, Fugro, Nova Metrix, Geokon, Geocomp, Sisgeo, Cowi – The Daily Chronicle

Source: Geotechnical Instrumentation and Monitoring Consumption Market Size to Witness Huge Growth by 2027 | By Top Leading Vendors – Keller, Fugro, Nova Metrix, Geokon, Geocomp, Sisgeo, Cowi – The Daily Chronicle

By smadi66|September 22nd, 2020|Geotechnical Arkansas, Geotechnical Indiana, Geotechnical New Jersey, Geotechnical Minnesota, Geotechnical Vermont, Geotechnical California, Geotechnical Kentucky, Geotechnical New Mexico, Geotechnical Alabama, Geotechnical Virginia, Geotechnical Colorado, Geotechnical Tennessee, Geotechnical New York, Geotechnical Connecticut, Geotechnical Washington, Geotechnical Delaware, Geotechnical Illinois, Geotechnical North Dakota, Geotechnical Florida, Geotechnical Wyoming, Geotechnical Idaho, Geotechnical Michigan, Geotechnical Oklahoma, Geotechnical Mississippi, Geotechnical Louisiana, Geotechnical Missouri, Geotechnical Oregon, Geotechnical Nebraska, Geotechnical Maine, Arlington Heights, Geotechnical Rhode Island, Geotechnical North Carolina, Geotechnical Massachusetts, Geotechnical Georgia, Geotechnical South Carolina, Geotechnical West Virginia, Geotechnical Montana, Geotechnical Maryland, Geotechnical South Dakota, Geotechnical Services, Geotechnical Nevada, Geotechnical Pennsylvania, Geotechnical Texas, Geotechnical Arizona, Geotechnical New Hampshire, Geotechnical Wisconsin, Geotechnical Utah|0 Comments

Why Would You Need a Track CPT Rig?

Vertek CPT wants to ensure that you have the right equipment to grow your business. As you are going through the CPT rig purchase process, we’ll have extensive conversations to ensure that we are both on the same page when it comes to where you will be testing, what types of tests you can most easily sell, and which rig or rigs will help you to make the most money. Track Rig Features As you look around our site, you’ll see that some rigs are built on tracks, as opposed to truck beds with wheels. As per with construction equipment, you might expect the tracked equipment to be larger, with CPT rigs the tracked units tend to be smaller. This is because tracked rig CPT platforms are designed to not only traverse and work in difficult terrains, but also to be highly maneuverable around obstacles such as trees, rocks and gulleys. Remember, CPT testing may be specified by your customer for pre-construction activities, meaning that it takes place on a site with little preparation. Having a highly maneuverable platform with low ground pressure can make the difference between you being able to win certain jobs and not. Track rigs are usually designed in order to distribute the weight of the rig over more square inches of contact area. This helps to minimize damage to sensitive areas as well as help the rig not get stuck in less than optimum ground conditions. The overall rig footprints are designed so that the units can be effectively trucked to sites within your service area. Track rigs are designed for deep pushes in tough geologies and the Vertek CPT tracked rigs push from about 10 tons up to 25 tons. With the right combination of weight, ease of maneuverability and set-up features, a tracked [...]

By smadi66|December 5th, 2019|Geotechnical Wisconsin, Geotechnical Alabama, Geotechnical West Virginia, Introductory, Geotechnical Arizona, Geotechnical Texas, Geotechnical Utah, Geotechnical Vermont, Geotechnical Virginia, Geotechnical Washington, Geotechnical Wyoming|0 Comments

Measuring the Moisture Content of Soil Using CPT

Measuring soil moisture content can be important for a variety of reasons. In placing underground electrical equipment or digging tunnels, it can be essential to know exactly what soil moisture conditions look like at specific depths. Early CPT test procedures used the standard CPT output data of cone resistance, sleeve friction and friction ratio to identify all of the parameters underground. When it comes to soils that have some moisture content or are saturated, it can be helpful to use a boring rig to obtain soil samples at depth close to the first CPT sounding. This enables you to ‘calibrate’ your rig to the site to ensure that the interpretations of the test data are accurate. Because establishing subsurface moisture content can be safety-critical in certain cases, Cone Penetration Testing methodologies have evolved to provide relative soil moisture content data. It is now possible to measure soil moisture more directly at the cone head vs. inferring what the moisture might be through interpreted sounding data. One method of measuring the presence of water is with a ‘piezocone’. This is a CPT cone that is fitted with a device that measures pore pressure. As the cone penetrates into saturated soils, hydraulic (water) pressure is exerted on the instrumented cone. By watching this pressure increase and decrease as the cone is driven deeper into the ground, it is possible to measure the presence of moisture at depth. This type of approach is better suited to soil conditions in which it is expected for the soil to be fairly wet to saturated conditions. Another method of establishing the extent of the presence of water is by using electrical sensors such as a dielectric probe, which measures soil electrical conductivity. This can be a useful practice and can be helpful in soils with less [...]

By smadi66|December 5th, 2019|Geotechnical Alabama, Geotechnical West Virginia, Experienced, Geotechnical Arizona, Geotechnical Arkansas, Geotechnical California, Geotechnical Vermont, Geotechnical Virginia, Geotechnical Washington, Geotechnical Wyoming, Geotechnical Wisconsin|0 Comments

Soil Electrical Conductivity

In terms of measuring soil contamination, measuring soil electrical conductivity can provide useful information for a more complete site characterization study. Measuring sub-surface soil electrical conductivity is becoming less expensive as well as faster and easier. This form of measurement has most commonly been used for measuring physical and chemical soil properties but the ability to pinpoint contaminants is improving, particularly with software designed for the job. How to Measure Soil Conductivity Measuring soil electrical conductivity is facilitated by two different types of sensors, a contact sensor and a non-contact sensor. Contact sensors work by making contact with soil to measure electrical conductivity directly. These types of instruments are most often used along the surface of a field to characterize the soil for agricultural purposes. Non-Contact Sensors Non-contact sensors, as the name implies, function without having to touch the soil directly. This method is based on the measurement of the change in mutual impedance between a pair of coils passed through the soil. Electricity is applied through the coils, which creates a magnetic field. Much like the way an induction motor operates, this magnetic field induces an electrical current in nearby materials that are magnetic. You can assess the level of current induced by measuring the impedance in the operating coils. Passing non-contact sensors down a borehole has been used effectively to establish geophysical properties such as the presence of clay (which may have highly conductive materials distributed through it) and water table levels. In cases where an area is known to have contamination, the identification of clay layers and groundwater distribution can help to estimate where 'plumes' of contamination might be contained orspread underground. In the case of a borehole test, water samples can be gathered directly from discrete depths to confirm the presence of various types of contaminants. [...]

By smadi66|December 5th, 2019|Introductory, Soil Testing, Geotechnical Oregon, Geotechnical Rhode Island, Geotechnical South Carolina, Geotechnical South Dakota, Geotechnical Texas, Geotechnical Utah, Geotechnical Vermont, Geotechnical Tennessee, Geotechnical Virginia, Geotechnical Pennsylvania|0 Comments